Coin counterfeiting

Year ago, I read someone who tried to bring in counterfeit $1 coin into Singapore but he was caught. I had the same idea but didn't take actions. This is a great idea but the craftmanship must be good. The reason why this fellow fails is because he used lousy mould and material and one look at the fake coins, it can be spotted easily. To perfect this illegal trade, one must find a high skill mould maker plus use a similar material. For all we know, coin counterfeit is much easier than notes as there are no tell tale signs. Also, the value involved is too small, authority might not take a good look at it. To check whether the coin can pass the test, just put any fake coin into any coin deposit machine and if it is rejected, it fails the test.